Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
The arrival of May coincides with an average high-temperature of an agreeable 22.4°C (72.3°F), indicating a minimal shift from April's 24.4°C (75.9°F). Despite higher daytime temperatures, nighttime averages fall to a cool 10.3°C (50.5°F) in May in Derby.Humidity
In May, the average relative humidity is 48%.Rainfall
In Derby, in May, it is raining for 3.3 days, with typically 5mm (0.2") of accumulated precipitation. Throughout the year, there are 118.3 rainfall days, and 411mm (16.18") of precipitation is accumulated.Daylight
The average length of the day in May in Derby is 10h and 51min.On the first day of the month, sunrise is at 06:35 and sunset at 17:42. On the last day of May, in Derby, sunrise is at 06:50 and sunset at 17:28 SAST.
Sunshine
In May, the average sunshine is 7.6h.UV index
May through July, with an average maximum UV index of 4, are months with the lowest UV index in Derby. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the average person.Note: The maximum UV index, 4 during May, leads to the following recommendations:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Frequently asked questions
What is the average May temperature in Derby?
What is the average humidity in May in Derby?
How many days does it rain in May in Derby?
How many hours of daylight does Derby have in May?
When are sunrise and sunset in May in Derby?
How long on average sun shines in May in Derby?
When is the lowest UV index in Derby?
How high is the UV index in May in Derby?
Average temperature in May
Derby, South Africa
- Average high temperature in May: 22.4°C
The warmest month (with the highest average high temperature) is January (29.3°C).
The month with the lowest average high temperature is July (18.9°C).
- Average low temperature in May: 10.3°C
The months with the highest average low temperature are January and December (18°C).
The coldest month (with the lowest average low temperature) is July (6.3°C).
Average pressure in May
Derby, South Africa
- Average pressure in May: 1020.7mbar
The month with the highest atmospheric pressure is July (1024.4mbar).
The month with the lowest atmospheric pressure is January (1012.3mbar).
Average wind speed in May
Derby, South Africa
- Average wind speed in May: 7km/h
The windiest month (with the highest average wind speed) is October (10.6km/h).
The calmest months (with the lowest average wind speed) are March and May (7km/h).
Average humidity in May
Derby, South Africa
- Average humidity in May: 48%
The month with the highest relative humidity is February (61%).
The month with the lowest relative humidity is September (32%).
Average rainfall in May
Derby, South Africa
- Average rainfall in May: 5mm
The wettest month (with the highest rainfall) is December (95mm).
The driest months (with the least rainfall) are July and August (1mm).
Average rainfall days in May
Derby, South Africa
- Average rainfall days in May: 3.3 days
The month with the highest number of rainy days is January (20.7 days).
The month with the least rainy days is August (1 days).
Average daylight in May /
Average sunshine in May
Derby, South Africa
- Average daylight in May: 10h and 5min
The month with the longest days is December (Average daylight: 13h and 42min).
The month with the shortest days is June (Average daylight: 10h and 30min).
- Average sunshine in May: 7h and 4min
The month with the most sunshine is October (Average sunshine: 11h and 54min).
The months with the least sunshine are June and August (Average sunshine: 7h and 30min).
Average sunshine days in May
Derby, South Africa
- Average sunshine days in May: 27 days
The month with the most sunshine days is July (29.3 days).
The month with the least sunshine days is January (6.6 days).
Average UV index in May
Derby, South Africa
- Average UV index in May: 4
The months with the highest UV index are January, February, March, October, November and December (UV index 6).
The months with the lowest UV index are May, June and July (UV index 4).
Average cloud cover in May
Derby, South Africa
- Average cloud cover in May: 8
The months with the most cloud cover are January and December (Cloud cover 24).
The months with the least cloud cover are July and August (Cloud cover 5).
Average visibility in May
Derby, South Africa
- Average visibility in May: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Derby, South Africa
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